| 查看: 919 | 回复: 11 | |||
[交流]
交流
|
请问虫子们:你们有没有做过油脂里的总酚含量测定?我们现在测遇到了一些问题,很无助,周围都没有人在做,不知道该怎么继续了? |
» 猜你喜欢
食品工程一志愿西北大学309分求调剂
已经有3人回复
26考研农业管理调剂 263分 诚意求调剂
已经有0人回复
食品科学论文润色/翻译怎么收费?
已经有171人回复
食品与营养313分调剂
已经有0人回复
331求调剂
已经有2人回复
一志愿西北大学食品工程309分求调剂
已经有2人回复
求助!淀粉-多酚复合物的制备!
已经有6人回复
食品学硕考研调剂
已经有10人回复
一志愿西北大学食品工程309求调剂
已经有0人回复
273农学求调剂
已经有0人回复
一志愿上海海洋大学083200,303分求调剂
已经有0人回复
» 抢金币啦!回帖就可以得到:
陕西理工大学资源与环境、材料化工方向部分调剂指标-理工兼收
+1/186
欢迎报考赣南师范大学智能制造与未来能源学院
+2/148
广东医科大学 陈胜昔教授团队(国家级人才;AI医药创新研发平台)高薪聘请博士后
+1/86
南方医科大学中药学院 调剂硕士生一名 中药学专业
+1/81
招收基础医学、医学技术、医学检验、公共卫生与预防医学、药学等专业硕士研究生调剂
+3/55
中国石油大学(华东)化学化工学院学硕、专硕接收调剂
+1/43
大连工业大学 高分子材料 接收考研调剂
+1/40
济南大学水利与环境学院赵艳侠简介
+1/38
南通大学国家级人才团队招收卫生检验、医学检验相关方向调剂研究生
+2/34
环境化学、地学、环境毒理方向,擅长污染物迁移转化降解、分析检测、计算模拟者优先
+1/32
上海中医药大学创新中药研究院 招收审核制博士生一名
+1/16
双一流大学湘潭大学“化工过程模拟与强化”国家地方联合工程研究中心招收博士生
+1/13
天津理工大学招收材料、化学和物理背景硕士调剂生
+1/12
食品学硕考研调剂
+1/10
课题组招收专业代码08开头的学硕!
+1/8
北京石油化工学院天然高分子与生物材料组招收0817化学工程与技术及0856材料与化工调剂
+1/8
华东师范大学-分析化学-招收1名博士研究生 (2026年,第二批)
+1/7
广东省五邑大学MOFs催化功能材料课题组招收化学/材料背景调剂生
+1/6
墨子实验室理论计算和模拟研究组诚聘海内外优秀人才
+1/5
NTU招聘生物微机电系统/微流控/3D打印/可穿戴器件方向全奖博士/博士后
+1/4
2楼2012-04-25 15:21:02
3楼2012-04-25 15:37:24
4楼2012-04-25 15:42:23
5楼2012-04-25 15:49:12
|
是的,福林酚法,我们是测油的总酚含量,先用正己烷和甲醇提取出来,再测,按照文献上的操作,但是吸光度却很低,假若增加样品溶液的量又会产生沉淀。Briefly for the extraction of phenolic compounds, 10 g of oil was mixed with hexane (50 ml). This mixture was placed into a separation funnel and 20 ml of methanol: water (60:40, w:w) was added. The mixture was shaken for 2 min and the separated water phase was removed. This procedure was applied three times and all the water phases were combined and used for TP analysis. For TP analysis, the mixture of the sample solution (50 ll), distilled water (3 ml), 250 ll Folin–Ciocalteu’s reagent solution, and 7% Na2CO3 (750 ll) was vortexed and incubated for 8 min at room temperature. Then 950 ll of distilled water was added. The mixture was allowed to stand for 2 h at room temperature. The absorbance was measured at 765 nm against distilled water as blank |
6楼2012-04-25 17:38:58
7楼2012-04-25 18:15:37
8楼2012-04-25 20:37:07
|
我们是测油的总酚含量,先用正己烷和甲醇提取出来,再测,按照文献上的操作,但是吸光度却很低,才0.08左右,代到标曲里面算到的总酚含量也很低,明显错的。假若增加样品溶液的量又会产生沉淀。方法是:Briefly for the extraction of phenolic compounds, 10 g of oil was mixed with hexane (50 ml). This mixture was placed into a separation funnel and 20 ml of methanol: water (60:40, w:w) was added. The mixture was shaken for 2 min and the separated water phase was removed. This procedure was applied three times and all the water phases were combined and used for TP analysis. For TP analysis, the mixture of the sample solution (50 ll), distilled water (3 ml), 250 ll Folin–Ciocalteu’s reagent solution, and 7% Na2CO3 (750 ll) was vortexed and incubated for 8 min at room temperature. Then 950 ll of distilled water was added. The mixture was allowed to stand for 2 h at room temperature. The absorbance was measured at 765 nm against distilled water as blank |
9楼2012-04-25 22:48:24
10楼2012-04-25 23:26:11
11楼2012-04-26 08:20:54
12楼2012-04-27 22:35:27














回复此楼